are these complains forwarded to cybercell to track the thief or is this the job of network operators. also one police told me that it may take months to recover but here the local police is not taking this seriously.just told me to give an application.
regarding the change in imei number its possible but very difficult for s4. my s4 was rooted so it makes the job much easier.
i dont have any hope from local police but still i will try to register an FIR and leave upto god.